Create a new MultiSelect component the supports the default version design. Related to grommet/hpe-design-system#2746

Deliverables

• draft pull request, ready for feedback

Update 8/5:
This week I worked on building a new MultiSelect component that supports both the default and variant versions of the design. Next week I will be focusing on code consolidation between Select and MultiSelect as well as ensuring support for different types of options that can be passed, custom children, etc.

Update 8/22:
Last week I finished the indes.d.ts and propTypes.js files, added unit testing, and consolidated common code into a utils file. This week I am working on breaking up the component into smaller separate components (SelectValue, SelectClear, SelectOptions, SelectOption) and continue to add more unit tests.